Hot-blast valve.



M. L. ROWE.

HOT BLAST VALVE.

APPLIOATION rum) r2121, 1909.

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M; L. ROWE.

HOT BLAET VALVE.

APPLIGATIGH FILED THE. 27, 1909.

Patented July 6, 1909.

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UNITED STATES OFFICE.

MARTIN L. ROWE, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO SLATER '1. FIERO, OF PITTSBURG, PENNSYLVANIA.

HOT-BLAST VALVE.

, To all whom it may concern:

Be it known that I, MARTLN L. Rowe, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Hot-Blast Valves, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to hot blast valves, and more particularly to that ty 0 of valve used for controlling the supply of .iot air to a blast furnace or similar structure, wherein a hot blast of air is used to facilitate the operation of the furnace or structure.

The invention has for its object to provide a novel valve wherein the use of a fire brick lining is eliminated and water in circulation employed for preventing the valve from warping, sealing, or becoming worn due to the pressure of a blast of hot air passing through the same or checked thereby.

To this end, I have devised. a water cooled valve and valve seat wherein a liquid seal is utilized for insuring a non-lcakable connection when the valve is closed. For sealing purposes mercury can be advantageously used on account of the high pressure present and of the high tern erature of the gas devel- 0 ed in the same. To prevent evaporization o the sealing liquid the cooling medium employed in the valve seat is utilized.

The invention will be hereinafter described in detail, and reference will now be had to the drawings, wherein there is illustrated the preferred embodiments of the invention, but I desire it to be understood that the structural elements thereof can be varied or changed Without departing from the spirit and scope of the invention.

In the drawings, Figure 1 is a vertical sectional view of a valve constructed in accordance with my invention, Fig. 2 is a horizontal sectional view of the valve taken on the line X-X of Fig. 1, Fig. 3 is a similar view taken on the line YY of Fig. 1, Fig. 4 is a similarview taken on the line Z-Z of Fig. 1, and Fig. 5 is a similar view taken on the line VV-lV of Fig. 1.

In the accom anying drawings 1 designates a hot air b ast supply pipe having the upper end thereof provided with an annular bracket 2. Mounted upon the bracket 2, is the base of the hot blast valve, said base forming the seat for the movable valve which Specification of Letters Patent.

Application filed February 27, 1909.

Patented July 6, 1909.

Serial No. 480,360.

controls the )assage of a hot blast to a furnace or similar structure. The base of the valve comprises an inverted frusto-conical shaped casting having an outer shell 3 and an inner shell 4, providing an annular water compartment 5. Connecting with the lower edges of the shells 3 and 4 is a frusto-cOnical shaped water jacket 6 having a water compartment 7f communicating with the water compartment 5. The upper end of the valve base extends above the jacket 6 and is provided with a nipple 8 for a water supply connection. The water for the compartment 5 of the valve base flows into the compartment 7 of the water jacket 6, and is removed from this water jacket through a by-path 9 provided therefor within the compartment 7 the water being ejected from the nipple 10 at the lower end of the valve base.

The arrangement of the water jacket relative to the shells 3 and 4 of the valve base, provides an annular sealing chamber 11, V- shaped in cross section. In this chamber mercury 12, or a similar liquid of a high specilic gravity is placed; the shells I; and ihaving an inlet port 13 for the mercury and an outlet port 14, these ports allowing the mercury to be removed and renewed.

In order that the sealing chamber 11 can be easily cleaned, the shells 3 and a of the valve base are provided with hand openings 15 normally closed by )lugs 16. The hand openings .15 are formed circumferentialiv ol' the valve base, whereby the confronting faces of the shell i, and the water jacket 6 can be thoroughly cleansed, and foreign matter removed from the sealing chamber.

Mounted upon the upper edges of the valve base is a cylindrical casing 17 having an exhaust pipe 18. The upper end of the casing 17 is closed by a cover 1.) having a central vertical stalling box 20 [or a tubular valve rod 21, said rod having the upper end thereof provided with a stuiiing box 22 for a water inlet pipe 23. The up )er end of the tubular rod 21 is also providm with a clamp 24, whereby the valve rod 21 can be raised and lowered by a suitable housing device, (not shown).

Located at the lower end of the tubular valve rod 21 is a hood, comprising an outer shell 25 having a tapering end. :26 formed integral with the lower edge of a dome .37 arranged within the shell 25, said dome 27 being connected to the shell 25 and the tapering end 26 thereof by a plurality of radially disposed ribs 28 having openings 29 formed therein. The upper and lower ends of the ribs 28 terminate in proximity to the upper and lower ends of the hood providing openings 30 and 31, which together with the open lugs 29 are adapted to allow a circulation of water throughout the hood between the shell 25 and the dome 27.

The top of the hood is closed by a countersunk cover 32 carried by the ribs 28, said cover having a central interiorly threaded socket 33, and screwed into said socket is a depending stem 34 of a coupling 35, to which the tubular valve rod 21 is connected. The water inlet pipe 23 is also connected to the coupling 35, and said water inlet pipe communicates with a port 36 formed in said coupling, said port being connected by a pipe 37 to a nip le 38 communicating with the interior of t 1e valve hood. The coupling 35 is also connected by a pipe 35) to a nip le 40 disposed opposite the nipple 38 an communicating with the interior of the valve hood.

The tubular valve rod 21 adjacent to the clamp 24 is provided with a water outlet pipe 41 and this pipe, together with the pipe 23 are adapted to be connected by hose or flexible connections (not shown), to suitable water inlet and outlet pipes, whereby irrespective of its position of the valve rod 21, water can circulate throughout the valve hood.

With the valve hood. in the position shown in Fig. 1 of the drawings, a hot blast of air from the pipe 1 can enter the dome 27, passing downwardly under the edges of said dome and upwardly between the shell 25, casing 17 and the valve base, and then exhaust through the pipe 18. During this passage of a blast of hot air through the valve, water or a similar cooling agent is circulated through the valve base and the valve hood, to prevent the base and hood from becoming distorted on account of the high temperature to which these elements are subjected. By lowering the valve rod 21, the lower end of the hood enters the mercury or sealing liquid within the sealing chamber 11, displacing some of the liquid and forcing the same u wardly between the confronting faces of t is hood, shell 4 and water jackets 6, forming a positive seal and shut-oh for the hot blast of air retained Within the pipe 1, Water jacket 6 and dome 27. With the valve hood in a lowered position, the shell 25 closes the exhaust pipe 18, preventing a back pressure of foreign matter from a blast furnace or similar structure from effecting the valve.

It is thought that the operation and utility of the valve will be fully understood from the foregoing description, and I reserve the right to use the valve as a shut-oil for steam, or a gas under pressure.

Having now described my invention what I claim as new, is

1. In a hot blast valve, the combination with an air supply pipe and an exhaust pipe, of a valve base mounted upon said air supply pipe, said base comprising inner and outer shells forming a water compartment, a water jacket connecting with the lower edges of said shells and communicating with said water compartment, said shells and said water jacket providing a sealing chamber adapted to contain mercury, said shells having hand openings formed therein, plugs closing said openings, said shells having water inlet and outlet openings formed therein, a casing mounted upon said valve base and communicating with said air exhaust pipe, a tubular valve rod movably mounted within said casing and adapted to communicate with a water outlet wipe, a hood carried by the lower end of said tubular valve rod, said hood comprising a shell having a tapering end, a dome arranged within said shell and connecting with the ta )ering end of said shell, ribs connecting said shell with said dome, a water sup )ly pipe arranged within said tubular valve rod and adapted to connnuni cate with the interior of said hood shell, and means for establishing communication be tween said tubular valve rod and the interior of said hood, substantially as described.

2. In a hot blast valve, the combination with an air supply pipe and an exhaust pipe, of a valve base mounted upon said air supply pipe, said base comprising inner and. outer shells forming a water compartment, a water jacket connecting with the lower edges of said shells and communicating with said water compartment, said shells and said water jacket providing a sealing chamber adapted to contain mercury, said shells having water inlet and outlet openings formed therein, a casing mounted upon said valve base and communicating with said air exhaust pipe, a tubular valve rod movably mounted within said casing and adapted to communicate with a water outlet pi e, a hood carried by the lower end of said tu iular valve rod, said hood comprising a shell having a ta )erin end, a dome arranged within said shell an connecting with the ta erirw end of said shell, ribs connecting sait shell with said dome, a water supply pipe arran ed within said tubular valve rod. and adapte to communicate with the interior of said hood shell, and means for establishing communication between said tubular valve rod and the interior of said hood, substantially as described.

3. In a hot blast valve, a valve base adapted to be mounted. upon an air supply )ipe, a casing mounted u on said base and aving an exhaust air out et, a water jacket formin a continuation of and extending within sai base and providing a chamber adapted to contain a sealing liquid, a tubular valve rod shiftably mounted within said casing and forming a water outlet pipe, a hood comprising a shell, a dome arranged within the shell and connected to the lower end thereof, said hood having its top provided with means to constitute a socket and with which said stem communicates, a water supply pipe extending through said stein, means for establishing communication between the interior of the hood and said stem, and means for establishing communication between said pipe and the interior of the hood.

4. In a hot blast valve, a valve base adapted to be mounted upon an air supply pipe, a casing mounted u on said base and having an exhaust air out et, a water jacket formin a continuation of and extending within sai base and providing a chamber adapted to contain a sealing liquid, a tubular valve rod shiftably mounted within said casing and forming a water outlet pipe, a hood comprising a shell, a dome arranged within the shell and connected to the lower end thereof, said hood having its top provided with means to constitute a socket and with which said stein communicates, a water supply pipe extending through said stem, means for establishing communication between the interior of the hood and said stem, means for establishing communication between said pi e and the interior of the hood, and radially isposed a ertured ribs connecting the dome to the s lell.

5. A hot blast valve comprising a valve base adapted to be mounted upon an air supply pipe, a Water jacket communicating with said base at its bottom and extending within the base and forming a chamber adapted to contain a liquid seal, a casing mounted upon said valve base and having an air exhaust, a hood arranged within the casin and comprising a shell, and a dome locate within the shell and connected with the shell at the bottom thereof, ribs arranged within the hood and connecting the shell to the dome, a hollow stem attached to the hood, a pipe extending through the stem, means for establishing communication between the stem and the interior of the hood, and means for establishing communication between the pipe and the interior of the hood, said pipe constituting a water supply means and said stem constituting a water exhaust means, said stem shiftably movable within the casing.

In testimony whereof I ailix my signature in the presence of two witnesses.

MARTIN l1. ROWE. Witnesses:

A. J. Truce, K. H. BUTLER. 

